Q Adjustment Of The Holding Pressure Of The Bobbin Thread - Mitsubishi Electric LT2-2250-B1T Instruction Manual

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Q Adjustment of the holding pressure of the bobbin thread

( 1 ) Loosen the set screw Ⓑ for clamping the adjuster Ⓐ. (By using the socket wrench 1.5 in
accessories.)
( 2 ) When the adjuster Ⓐ is moved upward, the holding pressure becomes weak. On the other hand,
when the adjuster Ⓐ is moved downward, the holding pressure becomes strong.
( 3 ) Set the adjuster Ⓐ to the position where it can be gotten an adequate holding pressure of the
bobbin thread. (At this time, the leaf spring Ⓒ should be located in directly below the leaf spring Ⓓ.)
( 4 ) Tighten the set screw Ⓑ.
Ⓑ
Ⓐ
— 19 —
Ⓓ
Ⓒ
Strengthen
Ⓑ
Weaken
Ⓐ